It's a component. "Breadwinner" is a common pattern for showing up, so if that is your only model for what you do, and you can't do it, then you are up a creek.

But it's not the only way. You simply need to be able to show up, follow through on your commitments, and be a value add for your partner's life. Many find that money is the most natural way to do that, but it's far from the only model.